London developments may face both borough CIL and Mayoral CIL, with the local charge varying by zone and development type. The 2026 indexed rates below show the standard Mayoral bands for all 32 boroughs and published residential borough-rate examples for Redbridge, Richmond and Wandsworth. They are not a complete liability calculation. [1][2][3][4][5]
Standard Mayoral CIL bands in 2026
These are rates per square metre from the GLA's 2026 Annual CIL Rate Summary, not the older unindexed charging-schedule figures. The table groups the 32 boroughs by the standard geographical band. [2]
| Standard 2026 Mayoral rate | Boroughs |
|---|---|
| £96.97/m² | Camden; Hammersmith & Fulham; Islington; Kensington & Chelsea; Richmond upon Thames; Wandsworth; Westminster. |
| £72.73/m² | Barnet; Brent; Bromley; Ealing; Enfield; Hackney; Haringey; Harrow; Hillingdon; Hounslow; Kingston upon Thames; Lambeth; Lewisham; Merton; Redbridge; Southwark; Tower Hamlets; Waltham Forest. |
| £30.30/m² | Barking and Dagenham; Bexley; Croydon; Greenwich; Havering; Newham; Sutton. |
All three rows are taken from the GLA's indexed 2026 summary. [2]
The GLA schedule also distinguishes development-corporation areas and certain office, retail and hotel development in central London and the Isle of Dogs. Therefore the standard borough band is not sufficient for every plot or commercial use. Check the relevant area and use provisions before applying it. [2]
The borough charge is an additional layer
The following figures are also 2026 indexed residential rates, before any scheme-specific exemptions, reliefs or floorspace deductions. They are examples of the variation within London, not a ranking of boroughs or a claim that every local charging schedule has been reproduced. [3][4][5]
| Borough and charging zone | Published 2026 local rate |
|---|---|
| Redbridge: borough rate | £125.56/m² |
| Richmond: higher residential band | £418.41/m² |
| Richmond: lower residential band | £317.99/m² |
| Wandsworth: Nine Elms Area A | £1,031.39/m² |
| Wandsworth: Nine Elms Area B | £475.34/m² |
| Wandsworth: Roehampton | £0/m² |
| Wandsworth: rest of borough | £448.43/m² |
Redbridge's figure comes from its council annual summary; Richmond's two bands and Wandsworth's four residential zones come from their respective 2026 summaries. Locate the site on the relevant charging map: a general neighbourhood description is not an adequate substitute. [3][4][5][6]
A zero borough rate in one zone does not mean that Mayoral CIL is also zero. Equally, the table's borough figures should not be mistaken for totals already including the Mayoral layer. [5][2]
Why multiplying a rate by the entire building can be wrong
CIL depends on the chargeable development and the applicable calculation, not simply the gross size of a completed building. Government guidance explains the treatment of existing floorspace, exemptions and reliefs. A qualifying deduction or exemption can change liability, but it must be established for the actual proposal and relevant charging authority. [1]
For an appraisal, keep separate lines for the borough charge, Mayoral charge, potentially deductible floorspace and any relief being relied on. Confirm which permission and annual indexed figures govern the assessment. This is a practical calculation record, not permission to apply the most favourable rate published in any year. [1]
Do not deduct an announced discount prematurely
The government published its consultation on proposed time-limited London CIL relief on 16 July 2026; that consultation closed on 18 September 2026. A consultation does not establish a discount. Assess the applicable charge under the operative regulations and check any relief's eligibility and commencement before deducting it. [7][8]
Before budgeting on relief, establish its enacted terms, commencement and application to the site. A press announcement, a consultation and a formal liability calculation are different records. [7]
What needs checking next?
Annual indexation means a 2026 comparison should not be relabelled as a 2027 tariff. Obtain the relevant annual summaries and charging maps for the permission being assessed; an older base rate is not a substitute for an applicable indexed borough rate. [1][3][4][5]